 
 
 ;; 
-;; [0 0] "R"
-;; [1 0] "N"
+;; [0 0] :r
+;; [1 0] :N
 ;; ....
-;; [0 7] "r"
+;; [0 7] :r
 ;;
 
 

;;  defn move
;; From wikipedia:
;; A FEN record contains six fields. The separator between fields is a space. The fields are:
;; Piece placement (from white's perspective). Each rank is described, starting with rank 8 and ending with rank 1; within each rank, the contents of each square are described from file "a" through file "h". Following the Standard Algebraic Notation (SAN), each piece is identified by a single letter taken from the standard English names (pawn = "P", knight = "N", bishop = "B", rook = "R", queen = "Q" and king = "K").[1] White pieces are designated using upper-case letters ("PNBRQK") while black pieces use lowercase ("pnbrqk"). Empty squares are noted using digits 1 through 8 (the number of empty squares), and "/" separates ranks.
;; Active color. "w" means White moves next, "b" means Black.
;; Castling availability. If neither side can castle, this is "-". Otherwise, this has one or more letters: "K" (White can castle kingside), "Q" (White can castle queenside), "k" (Black can castle kingside), and/or "q" (Black can castle queenside).
;; En passant target square in algebraic notation. If there's no en passant target square, this is "-". If a pawn has just made a two-square move, this is the position "behind" the pawn. This is recorded regardless of whether there is a pawn in position to make an en passant capture.[2]
;; Halfmove clock: This is the number of halfmoves since the last capture or pawn advance. This is used to determine if a draw can be claimed under the fifty-move rule.
;; Fullmove number: The number of the full move. It starts at 1, and is incremented after Black's move.

         (moves (string->position "k" :black)))
      )
  (is (= 
        '([[0 0] [1 1]] [[0 0] [1 0]] [[0 0] [0 1]])
        (moves (string->position "kN" :black))))
  )
(defn test-non-ranging-moves[]
  (is (= 
        '([[0 0] [2 1]])
        (non-ranging-moves (string->position :n :black) [0 0] knight-rules)
        ))
  (is (= 
        '([[2 2] [4 3]] [[2 2] [0 3]] [[2 2] [4 1]] [[2 2] [0 3]])
